The Ice Mountain Splash is a boat ride in Yankee Harbor at Six Flags Great America. It's worth seeing on a time-permitting basis. The minimum height to ride is 42 inches.
Take a gentle cruise on an alleged canoe on wheels and relax ... until you encounter a 60 foot drop followed by a splash.
Today, the ride is renamed to Yankee Clipper, it's original name from its opening in 1976.